Paris-Roubaix did not disappoint. This year's edition was chaotic, beautiful, and terrifyingly difficult. As it always is. We break down Peter Sagan's win, the mistakes QuickStep made, and chat with Niki Terpstra and Taylor Phinney on the velodrome's infield.&nbsp; This week's Nerd Alert focuses on Sagan's unique bike, his crazy mid-race stem adjustment, and the special models pros get to use.&nbsp;